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Date: Tue, 20 Oct 2009 19:13:54 +0200
From: Roman Divacky <rdivacky@freebsd.org>
To: Ivan Voras <ivoras@freebsd.org>
Message-ID: <20091020171354.GA92192@freebsd.org>
References: <20091020122432.GA50817@ravenloft.kiev.ua>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: Make process title - % complete
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On Tue, Oct 20, 2009 at 02:42:17PM +0200, Ivan Voras wrote:
> Alex Kozlov wrote:
> 
> >Of course ps or top output much more convenient, but if setproctitle so
> >expencive and will be called so often, then SIGINFO may be good
> >compromise. 
> 
> Regarding speed of setproctitle(), here are some microbenchmark results 
> from the attached test source:
> 
> getpid: 3661124.75 iterations/s
> setproctitle: 591357.56 iterations/s
> 
> Meaning, setprocitle() is around 6 times more expensive than getpid(), 
> meaning it can only be pulled off nearly 600,000 calls/s on a 2.3 GHz 
> Core 2 CPU.

what about contention? setproctitle() is an sysctl so it will prevent
other sysctl's from working when being executed..